Sash-balance



1 (N0 MOd v J. P. SASH BALANCE No. 481,145. Patented Aug. 16, 1892.

UNITED STATES PATENT OFFICE.

JOSEPH P. MAGNEY, OF OAKLAND,

ASSIGNOR TO THE lWIAGNEY SASH SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 481,145, dated August16, 1892.

Application filed August 28, 1891.

To aZZ whom it may concern.-

Be it known that I, JOSEPH P. MAGNEY, a citizen of the United States,and a resident of the city of Oakland, county of Alameda, State ofCalifornia, have invented certain new and useful Improvements inSash-Locks; and I do hereby declare that the following isafull, clear,and exact description of the said invention.

My invention relates to devices for locking window-sashes at any pointin their vertical travel. It is particularly adapted, however, to sasheswhich are balanced by a spring or springs which act upon arack-and-pinion movement between the sash and its casing.

The object of my invention is to produce a simple, cheap, and effectivesash-lock which engages automatically with the spring-actuated pinionexcepting when positively released therefrom.

My invention consists in certain novel details of construction, whichare fully hereinafter described and claimed, and are illustrated in theaccompanying drawings, in which Figure 1 is a vertical section of partof a window-casing and one of its sashes. Fig. 2 is a similar sectionsomewhat enlarged to exhibit details of the lock more fully. Fig. 3 is ahorizontal section. v

The drawings are intended to illustrate the location of my sash-lock forthe lower sash at a point near the meeting rails of the two sashes; butit will be understood that a similar device is employed for the-uppersash and preferably placed, also, in proximity to the meeting rails.

The construction of spring sash-balances being now well understood, Ihave not considered it necessary in this case to show more of theoperative features of such a balance than are necessary to make clearthe relation of my sash-lock to them.

A represents the window-casing, and B the vertically-sliding sash.Thecasingis provided with a box 0, secured in its edge adjacent to thesash-runway and having journaled within it a pinion D, the teeth ofwhich project through the box C and engage with a rack E in the edge ofthe sash. This pinion, as will be understood, is connected to a helicalspring which, put under strain by the descent of the sash, communicatesits stored-up force to the Serial No. 403,976. (No model.)

pinion when the window is raised and thus assists in lifting the latter.By reference to Fig. 3, it will be seen that the teeth of the pinionoccupy only a small part of the thickness of the pinion, being formed inaprojecting flange a at one side of the latter.

In one corner of the box 0 is cast or otherwise secured a block b, inwhich is formed a guide for the sliding sash-lock F. The latter is of ageneral triangular shape, as shown in Fig. 2, so that it is partlyguided by the walls of the box C and partly by a projecting pin 0, whichenters and slides within the guide-hole in the block b. A shoulder dbears against the blockbwhen the lock is pushed in, as shown in Fig. 3,and limits its movement. The triangular part of the lock is providedwith an obliquely-set tooth e, which engages automatically with thepinion, a spring f, attached to the box C at g or other point ofsupport, bearing with its free end h against the tooth e and pressing itconstantly toward the pinion.

The sash-lock is operated from within aroom by a push-button 2', sunk inthe face of the window-casing and having a rod j, which bears upon or issecured to the lock itself. A passage is formed in the casing and thebox C to permit the entrance of the rod. In operating the lock torelease it it is onlynecessary, therefore, to push in the button, whichwill cause the lock to slide inward against the pressure of the spring funtil the tooth e is disengaged from the pinion, or, in other words, haspassed beyond the flange a. The window may now be raised or lowered, andwhen pressure is removed from the button the spring will force the toothintoengagement with the pinion again at whatever point the sash may be.For the upper sash the construction of the lock is precisely similar,excepting, of course, that the rod j must be longer, as the upper sashworks in a runway outside of that which guides the movement of the lowersash.

What I claim is- In a sash-lock, and in combination with the rack andpinion, the box in which the pinion is held, having in its corner and atone side of the pinion a guiding-block, a triangular locking-piecehaving a stem projecting from its side into the guiding-block and havingits 100 right-angular edges fitting in the corner of my hand, this 21stday of August, 1891, in the the box to be guided by the walls thereofand presence of witnesses. the spur on its free side, the spring forforcint, the locking-piece into engagement with 5 the pinion, and thestem projecting through Vitnessesr the casing, substantially asdescribed. L. V. SEELY,

In testimony whereof I have hereunto set GEO. T. KNOX.

JOSEPH P. MAGNEY.

